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Murine sarcoma and leukemia viruses: assay using clonal lines of contact-inhibited mouse cells
Abstract:
A continuous cell line of highly contact-inhibited cells (NIH/3T3) has been developed from NIH Swiss mouse embryo cultures. Its growth properties are similar to those of 3T3 and BALB/3T3. Although 3T3 is relatively insensitive to focus formation by murine sarcoma viruses, cloned lines of both NIH/3T3 and BALB/3T3 have been isolated that are highly sensitive to sarcoma virus focus formation and leukemia virus growth. The sensitivity and specificity are comparable to those found with primary embryo cells. MSV-transformed lines of NIH/3T3 have been obtained.
Insights
A new NIH/3T3 continuous cell line was developed from mouse embryos. This cell line is highly sensitive to murine sarcoma virus focus formation and leukemia virus growth, similar to primary cells.
Area of Science:
- Cell Biology
- Virology
- Genetics
Background:
- Contact-inhibited cell lines are crucial for studying viral transformation.
- Existing cell lines like 3T3 have limitations in sensitivity to certain viruses.
- Mouse embryo cultures provide a source for developing novel cell lines.
Purpose of the Study:
- To develop a continuous cell line from NIH Swiss mouse embryos.
- To characterize the growth and viral sensitivity properties of the new cell line.
- To compare the sensitivity of the new cell line to established lines and primary cells.
Main Methods:
- Culturing NIH Swiss mouse embryos.
- Establishing and cloning NIH/3T3 continuous cell lines.
- Assessing focus formation by murine sarcoma viruses (MSV).
- Evaluating leukemia virus growth.
Main Results:
- A continuous NIH/3T3 cell line with high contact inhibition was successfully developed.
- Cloned NIH/3T3 and BALB/3T3 lines demonstrated high sensitivity to MSV focus formation.
- The sensitivity and specificity were comparable to primary embryo cells.
- MSV-transformed NIH/3T3 lines were obtained.
Conclusions:
- The developed NIH/3T3 cell line serves as a valuable model for studying viral transformation.
- This cell line offers enhanced sensitivity for detecting and quantifying sarcoma virus activity.
- NIH/3T3 cells provide a reproducible and sensitive system for virology research.